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<title>Using as: MMIX-Syntax</title>

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<a name="MMIX_002dSyntax"></a>
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Next: <a href="MMIX_002dmmixal.html#MMIX_002dmmixal" accesskey="n" rel="next">MMIX-mmixal</a>, Previous: <a href="MMIX_002dExpand.html#MMIX_002dExpand" accesskey="p" rel="prev">MMIX-Expand</a>, Up: <a href="MMIX_002dDependent.html#MMIX_002dDependent" accesskey="u" rel="up">MMIX-Dependent</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Syntax-19"></a>
<h4 class="subsection">9.28.3 Syntax</h4>

<p>The assembly syntax is supposed to be upward compatible with that
described in Sections 1.3 and 1.4 of &lsquo;<samp>The Art of Computer
Programming, Volume 1</samp>&rsquo;.  Draft versions of those chapters as well as other
MMIX information is located at
<a name="mmixsite"></a><a href="http://www-cs-faculty.stanford.edu/~knuth/mmix-news.html">http://www-cs-faculty.stanford.edu/~knuth/mmix-news.html</a>.
Most code examples from the mmixal package located there should work
unmodified when assembled and linked as single files, with a few
noteworthy exceptions (see <a href="MMIX_002dmmixal.html#MMIX_002dmmixal">MMIX-mmixal</a>).
</p>
<p>Before an instruction is emitted, the current location is aligned to the
next four-byte boundary.  If a label is defined at the beginning of the
line, its value will be the aligned value.
</p>
<p>In addition to the traditional hex-prefix &lsquo;<samp>0x</samp>&rsquo;, a hexadecimal number
can also be specified by the prefix character &lsquo;<samp>#</samp>&rsquo;.
</p>
<p>After all operands to an MMIX instruction or directive have been
specified, the rest of the line is ignored, treated as a comment.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="MMIX_002dChars.html#MMIX_002dChars" accesskey="1">MMIX-Chars</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Special Characters
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="MMIX_002dSymbols.html#MMIX_002dSymbols" accesskey="2">MMIX-Symbols</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Symbols
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<tr><td align="left" valign="top">&bull; <a href="MMIX_002dRegs.html#MMIX_002dRegs" accesskey="3">MMIX-Regs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Register Names
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="MMIX_002dPseudos.html#MMIX_002dPseudos" accesskey="4">MMIX-Pseudos</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Assembler Directives
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